[meteorite-list] the tucson show emerald/ hans koser room

From: habibi abdelaziz <azizhabibi_at_meteoritecentral.com>
Date: Mon, 2 Feb 2009 14:11:39 -0800 (PST)
Message-ID: <506630.47097.qm_at_web62008.mail.re1.yahoo.com>

hello list,

the biggest achondrite diogenite the taoudinid,
make it to tucson today after a week hold in NY customs , i think they was impressed or so? , anyway it's safely arrived at hans koser room with mohamed sbai, so hurry up to see this beauty , i was told right now by phone , the first guy that saw it, almost fall over,
i think this will be the most amazing meteorite of the show, the biggest from africa achondrite and be sur to look with binocular inside the crystalisation is wonderfull , and it's not paired to any other diogenite and
some scientist said it's unique and other said unusual;

give me news
all the best
aziz habibi
here is the classification of this meteorite.


Proposed Name Taoudeni NWA Geographic Coordinates : N 22?47.5? W3?58.0?
City, County, province/state and Country : Taoudeni, (Tombouctou),Mali.
Find : December 2007
Major classification (group)4 : Diogenite

History: A Moroccan meteorite hunter (Dhamen Ouled Ali) looking for pieces of Erg Chech fall , found by chance this 23 kg single stone, 15 km North of the Taoudeni salines.
Physical characteristics: One single stone, with patches of fusion crust (5 to 10 % approximately). TKW 24,370 g. log ??= 2.8.
Petrography: A. Jambon, O. Boudouma, D. Badia ,UPVI. Study on one polished section by EMPA, SEM.
Cumulate texture of largely dominant orthopyroxene, with minor amounts of poikilitally enclosed olivine and chromite/pyrrhotite. Interstitial plagioclase and chromite. Rare silica and kamacite (mostly weathered) . A few clusters of subhedrehal olivine appear to be irregularly distributed (according to photographs of the whole stone). Millimetric crystals of gem quality. Mode from a BSE image on a polished section of about 2 cm2: Orthopyroxene = 87 %, Olivine = 7 %, Chromite = 1.6 %, Plagioclase = 3 %.

Mineral compositions and geochemistry: Abundant lo-Ca Pyroxene : En69Fs26Wo4; Cr2O3 = 0.7%; FeO/MnO = 31. Olivine Fa34; Cr2O3 = 0.03%, CaO = 0.08 %; FeO/MnO = 51. Minor hi-Ca Pyroxene: En45Fs13Wo42. Plagioclase An87Ab12Or1. Chromite : Mg# = 0.24; Cr/(Cr+Al) = 0.69. Kamacite with Ni = 12%.

Classification: Diogenite. Weathering : moderate. No shock features.

Type specimens: A specimen of 31 g and one polished section are on deposit at UPVI. A. Habibi (Erfoud) holds the main mass.


habibi aziz
box 70 erfoud 52200 morroco
phone. 21235576145
fax.21235576170


      
Received on Mon 02 Feb 2009 05:11:39 PM PST